Sink drain



June 2?, 1967 H. FRIEDMAN SINK DRAIN Filed Sept. 23, 1964 FIGE FIG. I

PIC-3.5

INVENTOR. HARRY FRIEDMAN BY ATTORN FIG. 6

United States Patent 3,327,326 SINK DRAIN Harry Friedman, Bayside, N.Y., assigner to Ideal TubulYar iorporation, Brooklyn, N.Y., a corporation of New Filed Sept. 23, 1964, Ser. No. 398,547 1 Claim. (Cl. 4286) This invention relates generally to household appliances and is particularly concerned with an improved sink drain.

It is an object of the present invention to provide an improved sink drain which maybe easily and rapidly assembled and disassembled with a minimum number of operations.

Another object of the invention is to provide a sink drain of the character described which has improved means for eliminating leakage.

A further object of the invention is to provide a sink drain of the character described which is susceptible of easy and rapid cleaning.

A still further object of the invention is to provide a sink drain of the character described which is capable of accommodating a tailpiece despite misalignment thereof.

Yet a further object of the invention is to provide a sink drain of simple, economical and sturdy design.

Other objects and advantages of the present invention Will become apparent from the following description as read in connection with the accompanying drawing.

In the drawing:

FIGURE 1 is a partially cross-sectioned elevational view of one form of the invention.

FIGURE 2 is an elevational view of the casing employed in the form of the invention depicted in FIG- URE 1.

FIGURE 3 is a plan view of the casing illustrated in FIGURE 2.

FIGURE 4 is a perspective view of the supporting ring employed in the form of the invention depicted in FIG- URE 1.

FIGURE 5 is a perspective view of the closure member employed in the form of the invention depicted in FIGURE 1.

FIGURE 6 is a fragmentary elevational view of a modified form of the invention.

Throughout the various views similar numerals are employed to refer to similar parts.

The present invention is intended to be used in conjunction with a fitting such as an adjustable plug of the type commonly employed in kitchen sink drains, such plug having a stem disposable in a lowered position within the casing of the drain so as to obstruct drainage, or in a position at right angles to the aforesaid lowered position, wherein said stem will assume an elevated position which permits drainage through the casing.

As shown in FIGURE 1 of the drawing, one embodiment of the invention comprises a casing, generally designated by the numeral 10 and provided with an annular lip 11. This annular lip 11 surmounts the marginal perimeter 12 of an aperture formed in a sink in the conventional manner, the said casing 10 being received within said aperture as shown in FIGURE 1.

The casing 10 may be seen more clearly in FIGURES 2 and 3 of the drawing, where it will be seen that its lip 11 depends from a hollow cylindrical body 9 provided with a tapered throat 13 having a hollow cylindrical neck 14. The neck 14 terminates in a horizontal base 15 having a central aperture 16, adapted to engage the aforesaid plug in the conventional manner, and a plurality of annularly disposed drainage apertures 17. The external periphery of the neck 14 is provided with a plurality of inclined nibs 18 disposed at intervals of ninety degrees.

As may be seen in FIGURE 1, the casing 10 is engageable with a supporting ring generally designated by the numeral 20 and provided with an annular flange 21 and a base 22. The base 22 is formed with a generally circular aperture 23 having a plurality of radially offset portions 24 which are adapted to receive the nibs 18 of the casing 10. When thus received, the casing 10 may be rotated so as to engage the nibs 18 with the adjacent margins of the aperture 23, thereby locking the casing 10 in engagement with the supporting ring 20 in the position depicted in FIGURE 1 of the drawing. Disassembly of the casing 10 and supporting ring 20 may be accomplished by reversing this procedure.

The annular flange 21 of the supporting ring 20 is provided with a plurality of apertures 25 which are threadedly engageable with adjusting screws 26.

As may be seen in FIGURE 1, these adjusting screws 26 are abuttable against an annular collar 28 which is surmounted by a circular washer 29. The said adjusting screws 26 may be turned so as to urge the washer 29 into contact with the lower surface of the sink, thereby providing a firm seat for the said adjusting screws 26 and at the same time insuring the rigidity of the supporting ring 20 and a tight, sealed contact in the region adjacent to the marginal periphery 12 of the aperture in the sink.

It will also be seen that the washer 29 acts as an insulator which interferes with the communication of changes in temperature to the adjusting screws 26, thereby avoiding any loosening thereof and consequent leakage which might accompany expansion and contraction of such screws 26 by reason of the presence of very hot or cold liquids within the drain.

Beyond this it will also be seen that the base 22 of the supporting ring 20 is provided with a plurality of apertures 30 each of which accommodates a bolt 31 which projects through an aperture 32 formed in the flange 33 of an annular closure member, generally designated by the numeral 34. As may be seen in FIGURE 5 of the drawing, this closure member 34 includes an inter mediate tubular element 35 formed integrally with the flange 33 and a horizontal base 36 provided with a circular aperture 38.

As shown in FIGURE 1 of the drawing, each bolt 31 is engaged with a Wing nut 39, which, when tightened, urges the flange 33 towards abutment with the base 22 of-the supporting ring 20. At the same time, the base 36 of the closure member 34 is brought into contact with the flange 49 of a tailpiece or drainpipe 41 which is accommodated within the aperture 38, thereby urging said flange 40 into tight contact with a circular washer 42 interposed between the flange 40 and the base 15 of the casing 10. In this way, a tight seal is maintained between the casing 10 and the tailpiece 41.

It will also be seen that the tightening of each wing nut 39 causes a downward pull to be exerted up on the supporting ring 20 which transmits such downward pull to the casting 10, thereby minimizing any tendency towards vertical misalignment of the casing 10 which might be present by reason of irregularities on the surface of the sink or other mating parts. So, also, selective adjustment of the wing nuts 39 will permit the closure member 34 to accommodate the tailpiece 41 even though the latter be substantially misaligned, i.e., substantially inclined to the vertical. In such a situation, the wing nuts 39 may be tightened to compress the circular washer 42 so as to accomplish a seal between the casing 10 and tailpiece 41 despite the fact that the flange 33 may not be perfectly horizontal. Hence, for these reasons, undesirable leakage due to misalignment of the assembled parts of the above described device is avoided; and this is accomplished without interfering with the ability of the user to assemble or disassemble the casing by appropriate manipulation of the adjusting screws 26 as hereinafter described.

A modified form of the invention is depicted in FIG- URE 6 of the drawing where it will be seen that the use of the bolts 3]. and wing nuts 39, as contemplated in the previously described form of the invention, is avoided. Here, each adjusting screw 26 extends through the flange 33 of the closure member 34 and is threadedly engaged with the flange 21 of the supporting ring 20, the head of such screw 26 supporting the flange 33. As before, each adjusting screw 26 is abuttable against the annular collar 28 so as to urge the washer 29 into compression against the lower surface of the sink, in the same manner as previously described. However, in this form of the invention, each adjusting screw 26 is also accommodated within a coiled compression spring 45 which is seated upon the flanges 21 and 33.

It will be seen from the foregoing that in the case of each of the described forms of the invention, extremely rapid assembly and disassembly may be accomplished. Thus, in each instance, the rotation of the nibs 18 of the casing 10 so as to dispose them in or out of contact with the lower surface ,of the base 22 of the supporting ring will accomplish such assembly or permit disassembly, thereby making the casing 10, the supporting ring 29, the interior of the closure member 34, which is accessible by way of the aperture 23 of the supporting ring, the annular collar 28, washer 29 and tailpiece 41, susceptible to maintenance and cleaning.

At the same time, during assembly of the various parts, the tightening of the adjusting screws 26 assures a firm, rigid structure which does not entail the risk of accidental loosening due to mechanical or thermal stress.

Moreover, in each form of the invention, the possibility of leakage is minimized by providing a minimum number of paths which might potentially function as sites for such leakage and by providing suitable washers thereat.

These results are achieved by means of a minimum number of parts of simple design, which are commercially available or easily formed by conventional means.

The embodiments of the invention illustrated and described hereinabove have been selected for the purpose of clearly setting forth the principles involved. It will be apparent, however, that the present invention is susceptible to being modified in respect to details of construction, combination and arrangement of parts which may be resorted to without departure from the spirit and scope of the invention as claimed.

I claim:

An improved sink drain comprising, in combination:

(a) a casing disposed within an aperture formed in a sink;

(b) a flange extending from said casing and surmounting the marginal perimeter of said aperture;

(c) a supporting ring provided with a planar lower surface;

(d) said casing including a neck portion disposable through said supporting ring;

(e) said neck portion being provided with a plurality of peripheral connection nibs engageable with the lower surface of said supporting ring to urge said supporting ring into abutment with said casing;

(f) said supporting ring including an annular flange provided with vertically adjust-able means;

(g) an annular collar having an inside diameter greater than said casing;

(h) a washer disposed between said collar and the lower surface of said marginal perimeter of said aperture;

(i) said vertically adjustable means being abuttable against said collar;

(j) said collar being urgeable by said vertically adjustable means to compress said washer against said lower surface of the marginal perimeter of the aperture, thereby securing said casing within said aperture;

(k) a tailpiece provided with an annular flange at the upper end of the tailpiece, the axis of said annular flange of the tailpiece being aligned with the axis of the tailpiece; I

(1) said casing including a lower portion provided with a central aperture and formed integrally with the neck of the casing;

(m) a resilient, annular washer surmounting the annular flange of the tailpiece and abuttable against the marginal perimeter of said central aperture when it is misaligned with the tailpiece and when said central aperture is aligned with the tailpiece;

(n) closure means including:

(i) a planar, annular flange depending from said supporting ring;

(ii) a base characterized by a cup-shaped depression extending through an angular interval of 3 60 degrees surrounding a central aperture wherein said tailpiece is accommodated;

(iii) an annular side wall disposed intermediately of said base and said planar, annular flange;

(0) three threaded members depending from said supporting ring at equal angular intervals and extending through said planar annular flange;

(19) each of said threaded members being engaged with a wing nut abuttable against said planar annular flange and adjustable to urge it into coplanar re lationship with the planar lower surface of said supporting ring;

(q) said annular flange of the tailpiece and said resilient annular washer being confinable within said cup-shaped depression while said planar, annular flange is being urged into coplanar relationship with the planar lower surface of said supporting ring;

(r) the annular flange of the tailpiece being continuously engageable with the surface of said cup-shaped depression throughout the full 360 degrees angular interval thereof while said planar, annular flange is being urged into coplanar relationship with the planar lower surface of said supporting ring, whereby the annular flange of the tailpiece is supported against deformation;

(s) said resilient, annular washer being compressible by the annular flange of the tailpiece against the marginal perimeter of the central aperture of said casing when said wing nuts are adjusted to urge said planar, annular flange into coplanar relationship with the planar lower surface of said supporting ring.

References Cited UNITED STATES PATENTS 262,581 8/1882 Doolittle. 2,819,028 1/1958 Brezosky et al. 4--287 3,096,527 7/1963 Eynon 428'7 3,104,400 9/1963 Lantz et a1. 4 2s7 1 3,170,607 2/1965 Anthon 222-400.?

' FOREIGN PATENTS 575,808 5/1933 Germany.

CARL W. TOMLIN, Primary Examiner.

D. W. AROLA, Assistant Examiner. 

